, 1887-03-05

tanning in the dilute juice almost the whole
Of the sugar contained in the cane. That
Ia Co say, that the quantity of juice obtain.
ed represents 81 per cent. Of the weight OF
the cane, but in a highly diluted form, as
compared with 60 per cent. in the case
where a single crushing mill is used.
The disadvantages of the system are as
follows -
1. Where mills now exist the money
spent upon them lie lost, and further CAPT
tai must be sunk in diffusion plant.
2. A largely increased evaporation is re-
uuired, involving considerable outlay of
capital and increased working expenses.
8. The megass now obtained and utilised
as fuel is lost.
4. Expense of getting rid of "schnitzel".
5. Expense Of water required.
Let US try TO put a money value on
these advantages and disadvantages in
order to see what is the prospect OF profit.
We will take for example an estate now
making 1000 tons Of sugar with u mill-ex-
traction of Sc per cent. aud a return Of
sugar equal to 9 per cent. of the weight OF
the canes.
Then f66 percent. Ofjuice give 9 percPnt.
Of sugar, "a per cent. should give 1l'45 per
cent, but it will probably not do SO, aS it
seems to be now fairly proved that when
Sc per cent. of juice is expressed by crush
ing, the Juice obtained is slightly richer in
sugar than the juice which remains unex-
pressed. We will neglect this, however,
and assume that an increase Of 245 per
cent. can be- obtained, and together with
this an amount Of offal equal to >el b per
ton Of uga At a price in the London
Market Of 1851 per cwt. this increase of
sugar allowing 2L6 per cwt. for freight
and charges) would be worth per 100 tons
Add ofFal... j.. 8 Il
gain per 100 tons o%fcanes, say. .R33 10 9
1000 tons of sugar at 9 per cent. re.
0uires It,111 tons canes; the total gam
will therefore be a 755 X A33 13I9=93,742.
Let us now calculate the cost of ObIaiu'
ing this.
Fret let us estimate the value Of the
megass lost. l estimate this at 1876 per
ton of sugar at present made. 1t would
make this paper too long TO explain how
arrive at this figure, but it is the result OF
very careful calculation, confirmed by ex-
perience. This will amount to ES25.
Secondly We must estimate the cost OF
getting rid of the "schnitzer". The guam.
tity to be got rid of will be 1888 tons at
least; suppose We assume | per ton, this
would represent G666.
Thirdly We have the increased evapo.
ration. With an extraction Of 66 per cent.
the quantity of juice obtained would be
1888 tons, of which 5000 would be water
to be evaporated. With diffusion the
quantity of diffused juice will be $4,000
tons, since ll,ll1 x,@os = 1888 tons, to
to which (see Fives.Lille Reportl 30 per
cent. of water is added 1888 I 4,66G =
1899, say, 14,OsO tons; of this l4,OOOtO tors
12241 tons will be water to be evapOrated.
The increased quantity of water TO be
evapOrated will therefore be 12,24l 5000
=6,24l tons, If this is done by means of
n triple effet, We may assume l2lbs. OF
water evapOrated to lib. of coal, or, rough
ly, $40 tons Of coal will be required, which
at 28i q ton will cost E728. N.B.-The
value of the coal must be estimated at its
cost at the boiler furnace; 28j is not too
high if the cost of carrying the coal from
ship.bOard to the estates, and again from
the coaAheap to the furnaces, is taken into
aCcOunt.)
Fo~rtAly.-We have the increased labour
required. This is rather a guess, but it
will not be less than FL per ton on the III.
creased quantity. of sugar, or &245.
FVthly.-Ve have sugar packages 81
per ton, and transport to ship.board, say
1OI per ton Elsa.